Introduction: Findings of recent research highlight the rapid increase in the national and global prevalence of Type 1 Diabetes Mellitus (T1DM) in children and adolescents—with thousands of newly diagnosed cases in people under 15 years of age. Setting as a constant priority the protection and promotion of their safety and health, but also the strengthening of their academic performance, the effective management of children and adolescents with diabetes Type 1(T1D) in the school area by teachers and health workers, such as the school nurses (SN), deemed necessary. Purpose: Given the increased incidence of type 1 diabetes in school-age children and, at the same time, identifying the gap found in the Greek literature regarding the management of this metabolic disease in the school setting, this paper attempts to investigate the views of diabetes on the management of suffering students with DD1 in the school context, but also the consolidation of the Institution of School Nursing (SNI) in every type and level of school structure. Material and Method: For the purposes of the research, a qualitative study was conducted with the participation of seventeen (17) school Nurses in schools in Attica with direct and daily contact with diabetic students. The semi-structured interviews carried out allowed the respondents’ voices to be heard and to outline—through a set of general questions, but also knowledge, opinion, and experience-related questions—their lived and challenging experiences within the school environment. Results: Through the narratives of the social subjects regarding the management of children with T1D, the following emerged: The Concept and Dimensions of School Nursing (goals, qualifications, role/responsibilities of T1D) and Management of T1D in the school environment (reinforcement and support of teachers and diabetic students respectively). Conclusions: The findings of the research highlight the role and necessity of the presence of SN in the school. At the same time, this work is expected to be a useful tool in the hands of those responsible for the planning and development of targeted actions and effective management strategies for students with T1D during their school life.